/*
// Licensed to Julian Hyde under one or more contributor license
// agreements. See the NOTICE file distributed with this work for
// additional information regarding copyright ownership.
//
// Julian Hyde licenses this file to you under the Apache License,
// Version 2.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 */
package org.olap4j.query;

import org.olap4j.metadata.Dimension;

import java.util.ArrayList;
import java.util.List;

/**
 * Abstract implementation of a selection.
 * 
 * @author LBoudreau
 */
abstract class AbstractSelection extends QueryNodeImpl implements Selection {

	Operator operator;
	Dimension dimension;
	List<Selection> selectionContext;

	public AbstractSelection(Dimension dimension, Operator operator) {
		this.dimension = dimension;
		this.operator = operator;
	}

	public Dimension getDimension() {
		return dimension;
	}

	public Operator getOperator() {
		return operator;
	}

	public void setOperator(Operator operator) {
		assert operator != null;
		this.operator = operator;
		notifyChange(this, -1);
	}

	void tearDown() {
	}

	public List<Selection> getSelectionContext() {
		return selectionContext;
	}

	public void addContext(Selection selection) {
		if (selectionContext == null) {
			selectionContext = new ArrayList<Selection>();
		}
		selectionContext.add(selection);
	}

	public void removeContext(Selection selection) {
		selectionContext.remove(selection);
	}

	public String getUniqueName() {
		return getRootElement().getUniqueName();
	}
}

// End AbstractSelection.java
